Some users say messages they've deleted keep reappearing in their inboxes.
The changes come amid larger challenges facing on-demand startups
The site is also restricting access to some controversial message boards.
Businesses can now respond to users' comments on Facebook via Facebook Messenger.
Ads with malicious code may have appeared across Yahoo's sites
Polyvore's site lets users search for clothing items and create themed collections
Security vulnerabilities in Flash could affect the use of Facebook games, the company said in a filing.
The aircraft is designed to provide Internet access to people in underserved areas, Facebook said.
The Facebook CEO seems set on virtual reality as the next medium for sharing content.
Profit shrunk as costs went up by more than 80 percent.
The company is considering changes to help it become a truly mass-market service
Growth in users came largely from people who don't hold actual accounts
After Nov. 29, data requests must be made on an as-needed basis to the FISA Court
A new online portal will make it easier for carriers to adopt the Internet.org app, Facebook says
The ruling looks to be the last nail in the coffin for suits filed in 2012